Authors
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Vijayan , P. ; Pionteck, J. ; Huczko, A. ; Puglia, D. ; Kenny, J. M. ; Thomas, S.
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Title
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Liquid rubber and silicon carbide nanofiber modified epoxy nanocomposites: Volume shrinkage, cure kinetics and properties
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Date
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18.08.2014
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Number
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38562
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Abstract
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A cyclic anhydride cured epoxy modified with carboxyl-terminated poly (butadiene-co-acrylonitrile) liquid rubber (CTBN) and SiC nanofibers was developed by two different mixing strategies. In mixing method 1, SiC nanofibers were sonicated in epoxy/CTBN mixture, while in mixing method 2 the sonicated epoxy/SiC mixture was mechanically mixed with CTBN. The effects of liquid rubber, SiC nanofiber and their mixing methods on the cure shrinkage and cure kinetics of an epoxy/nadic methyl anhydride system were studied using pressurevolumetemperature (PVT) analysis. The influence of SiC nanofiber and mixing method on cross-linking induced phase separation were investigated by means of optical microscopy. The glass transition temperature (Tg) and the thermal stability of nanocomposites were evaluated. The epoxy/SiC/CTBN nanocomposite prepared by method 2 exhibited enhanced Tg and thermal stability compared with neat epoxy and epoxy/CTBN blend. Moreover, improved impact strength was shown by epoxy/SiC/CTBN nanocomposites prepared by both methods, in comparison with epoxy/CTBN blend and epoxy/SiC nanocomposite. Additionally, fractographic analysis was carried out using scanning electron microscopy and a toughening mechanism for epoxy/SiC/CTBN nanocomposites was proposed.
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Publisher
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Composites Science and Technology
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Wikidata
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Citation
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Composites Science and Technology 102 (2014) 65-73
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DOI
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https://doi.org/10.1016/j.compscitech.2014.07.017
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Tags
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nano composites curing impact behavior thermogravimetric analysis (tga) pressurevolumetemperature (pvt) analysis
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